But ask any Gadol if a Yeshiva should not take someone because the parents arent as “frum” as you are
I suppose nobody would answer “yes” to such a vaguely worded question. Ask a more specific question, and you might get a different answer.
I’ve heard this issue about MO schools, and if true, it’s horrible. Inability to pay rarely results in non acceptance or expulsion in Chareidi schools. But what I really meant was to ask if those educated in MO or DL schools are more likely to stay frum (although that’s hardly the only marker for successful chinuch).